CHAMPAIGN, a city of Champaign county, Illinois, U.S.A., in a rich agricultural region, 125m. S. by W. of Chicago. It is on Federal highway 45 ; is served by the Big Four, the Illinois Cen tral, the Wabash and the Illinois Traction railways; and has a commercial air-port. The population in 1930 was 20,348. Cham paign and Urbana, adjoining it on the east, form practically one city, with common public utilities and civic enterprises. The only separate institutions are the post offices and the city governments. Champaign has the greater part of the business and industrial activities, which include railroad repair shops and manufactures of structural iron and steel, heavy castings, tools, refrigerators and textiles. Its total factory product in 1925 was valued at The campus of the University of Illinois (q.v.) lies partly in Champaign. At Rantoul, 14m. N. (population in 1920, 1,551) is Chanute Field, a flying field of the Army Air Corps. Champaign was founded in 1855 and incorporated as a city in 1860.